Is this subjective?
Spumwack is on his way to answer this I know.
Anyway. It is for my lucario who I am currently training to be used in competitive play.
i suggest you go for a special set but physical is good
Well you could go either way. Or you can go with Mixed since its Stats are about equal.This question here has sets that you could use. Includes Evs,Natures, and items. Experienced users post their sets there.